EP 4128016 A1 20230208 - MOTION TRACKING OF A TOOTHCARE APPLIANCE
Title (en)
MOTION TRACKING OF A TOOTHCARE APPLIANCE
Title (de)
BEWEGUNGSVERFOLGUNG EINES ZAHNPFLEGEGERÄTES
Title (fr)
SUIVI DE MOUVEMENT D'UN APPAREIL DE SOINS DENTAIRES
Publication
Application
Priority
- EP 20167083 A 20200331
- EP 2021056283 W 20210312
Abstract (en)
[origin: WO2021197801A1] A method of tracking a user's toothcare activity comprises receiving video images of a user's face during, e.g. a toothbrushing session, and identifying, in each of a plurality of frames of the video images, predetermined features of the user's face. The features include at least two invariant landmarks associated with the user's face and one or more landmarks selected from at least mouth feature positions and eye feature positions. Predetermined marker features of a toothcare appliance, e.g. a brush in use are identified in each of the plurality of frames of the video images. From the at least two invariant landmarks associated with the user's nose, a measure of inter-landmark distance is determined. An appliance length normalised by the inter-landmark distance is determined. From the one or more landmarks selected from at least mouth feature positions and eye feature positions, one or more appliance-to-facial feature distances each normalised by the inter-landmark distance is determined. A appliance-to-nose angle and one or more appliance-to-facial feature angles is determined. Using the determined angles, the normalised appliance length and the normalised appliance-to-facial feature distances, each frame is classified as corresponding to one of a plurality of possible tooth regions being brushed.
IPC 8 full level
A46B 15/00 (2006.01)
CPC (source: EP US)
A46B 15/0006 (2013.01 - EP US); G06F 18/24137 (2023.01 - EP); G06T 7/248 (2017.01 - US); G06T 7/74 (2017.01 - US); G06V 10/56 (2022.01 - US); G06V 10/82 (2022.01 - EP US); G06V 20/41 (2022.01 - US); G06V 20/46 (2022.01 - EP US); G06V 40/165 (2022.01 - EP US); G06V 40/171 (2022.01 - US); G06V 40/20 (2022.01 - EP US); A46B 2200/1066 (2013.01 - EP US); G06T 2207/10016 (2013.01 - US); G06T 2207/10024 (2013.01 - US); G06T 2207/30036 (2013.01 - US); G06T 2207/30201 (2013.01 - US); G06T 2207/30204 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2021197801 A1 20211007; BR 112022016783 A2 20221011; CL 2022002613 A1 20230728; CN 115398492 A 20221125; EP 4128016 A1 20230208; US 2024087142 A1 20240314
DOCDB simple family (application)
EP 2021056283 W 20210312; BR 112022016783 A 20210312; CL 2022002613 A 20220926; CN 202180025966 A 20210312; EP 21710968 A 20210312; US 202117914444 A 20210312